Combination of D0 and CDF results on ΔΓs and the CP-violating phase βsJ/ψφ

This webpage summarizes the blessed result of combination of D0 and CDF results on ΔΓs and the CP-violating phase βsJ/ψφ using 2.8 fb-1 data. This result is described in this public note

We present 68%, 95% and 99% confidence regions in the βsJ/ψφ-ΔΓs plane:


Assuming the standard model predictions of βsJ/ψφ and ΔΓs, the probability of a deviation as large as the level of the observed data is 3.4%, corresponding to 2.12 Gaussian standard deviations.

Additionally, we present a confidence interval of βsJ/ψφ, where ΔΓs is treated as a nuisance parameter, and find that βsJ/ψφ is within [0.27, 0.59] U [0.97, 1.30] at the 68% CL and within [0.10, 1.42] at 95% CL. In this projection, the p-value for the Standard Model point is 2.0% or 2.33 Gaussian standard deviations.

Below are all figures meant for download.